Vent hoses inside fuel tank

[JimmR75]

I have a '97 R1100RT that had been sitting for nearly 15 years before I purchased it.  It was put away wet and the fuel tank had dried out and was full of the residue you would expect.  The tank has been cleaned and I had the fuel pump, filter and fuel lines replaced and the entire plate refurbished by a reliable source (Reto in Canada).  

 

I am beginning reassembly and found that the vent / drain lines that run from the filler cap to the pump plate are going to have to be replaced as they are rigid with age and are deteriorating. This is my third 1100RT that I have redone but I've never had to replace these lines before.  

 

Will standard fuel line work or do I need a particular immersible fuel line?

 

Any input or recommendations will be appreciated.  Thanks in advance.

[Michaelr11]

21 minutes ago, JimmR75 said:

Will standard fuel line work or do I need a particular immersible fuel line?

 

It has to be rated for continuous immersion in gas.  Someone will give you the rating spec that should be stamped on the line.

 

I believe the hose has to be rated SAE 30R10.  Someone will correct me if I'm wrong.

[Redfoxx]

16 minutes ago, JimmR75 said:

I have a '97 R1100RT that had been sitting for nearly 15 years before I purchased it.  It was put away wet and the fuel tank had dried out and was full of the residue you would expect.  The tank has been cleaned and I had the fuel pump, filter and fuel lines replaced and the entire plate refurbished by a reliable source (Reto in Canada).  

 

I am beginning reassembly and found that the vent / drain lines that run from the filler cap to the pump plate are going to have to be replaced as they are rigid with age and are deteriorating. This is my third 1100RT that I have redone but I've never had to replace these lines before.  

 

Will standard fuel line work or do I need a particular immersible fuel line?

 

Any input or recommendations will be appreciated.  Thanks in advance.

 

Yes the line is submersible, 5mm x 10mm size, I purchased at Motorworks, UK. You also have to by 2 one yard pieces. One is not enough. 

 

 

[dirtrider]

3 hours ago, JimmR75 said:

I have a '97 R1100RT that had been sitting for nearly 15 years before I purchased it.  It was put away wet and the fuel tank had dried out and was full of the residue you would expect.  The tank has been cleaned and I had the fuel pump, filter and fuel lines replaced and the entire plate refurbished by a reliable source (Reto in Canada).  

 

I am beginning reassembly and found that the vent / drain lines that run from the filler cap to the pump plate are going to have to be replaced as they are rigid with age and are deteriorating. This is my third 1100RT that I have redone but I've never had to replace these lines before.  

 

Will standard fuel line work or do I need a particular immersible fuel line?

 

Any input or recommendations will be appreciated.  Thanks in advance.

Afternoon JimmR75

 

As mentioned above it needs to be fully submersible rated, not necessarily 30R10 rated but most that you will find are 30R10 rated.

 

Euromotoelectrics    (  https://www.euromotoelectrics.com/product-p/fp-venthose737.htm  ) has  a replacement submersible 5mm x 10mm. Probably same as  what Redfoxx listed above only from a USA supplier. (it isn't cheap)

 

Just make sure if you order a 5mm x 10mm submersible hose that you get the proper 10mm sized clamps with the hose as the OEM BMW vent hose is 5mm x 8mm  so the BMW hoses use a smaller clamp (never use standard worm gear type universal hose clamps) 

 

As Redfoxx mentioned, you might need (2ea) 1 meter lengths. A number of people have been able to make (1) one meter hose work by cutting it in half, others can't quite get the shorter lengths to work. Your existing BMW OEM vent hoses are slightly longer than 1/2 meter. My suggestion is to cut your original (failed) hoses to 1/2 meter then try reinstalling as a test fit. If it is too much of a pain to get 1/2 meter to work then you will need (2) expensive hoses.  

[King Herald]

I’m glad I read this, as I ordered hoses for mine a good while back, planning to do the fuel tank service over the winter, and just checked, I’ve only got one metre of the vent hose. 

I’ll order a second piece, as I don’t want to go to the hassle of pulling the tank apart only to find it’s not enough. 

 

[dirtrider]

3 hours ago, King Herald said:

I’m glad I read this, as I ordered hoses for mine a good while back, planning to do the fuel tank service over the winter, and just checked, I’ve only got one metre of the vent hose. 

I’ll order a second piece, as I don’t want to go to the hassle of pulling the tank apart only to find it’s not enough. 

 

Morning  King Herald

 

Yes, that is kind of lame on BMW's part as a 1.5 meter piece would cover both hoses. Could just be a sourcing issue or could be an on-purpose thing. 

 

Most of the non-BMW supplied 5mm vent  hoses are 10mm OD so they are not from the same source as the BMW 8mm OD vent hoses. 

 

Just make sure that you have the correct  size clamps for the hose OD that you are buying.

 

If you tie a string on the old vent hoses before pulling them out it makes reinstalling the new ones a LOT easier as they just pull back through without the fight.  

[King Herald]

20 hours ago, dirtrider said:

Morning  King Herald

 

Yes, that is kind of lame on BMW's part as a 1.5 meter piece would cover both hoses. Could just be a sourcing issue or could be an on-purpose thing. 

 

Most of the non-BMW supplied 5mm vent  hoses are 10mm OD so they are not from the same source as the BMW 8mm OD vent hoses. 

 

Just make sure that you have the correct  size clamps for the hose OD that you are buying.

 

If you tie a string on the old vent hoses before pulling them out it makes reinstalling the new ones a LOT easier as they just pull back through without the fight.  

Morning DR, 

Yes, the hoses were sourced from Motorworks, specialist BMW supplier that I order all my parts from. They know exactly what bike I have too, it’s all linked to my account. I have ordered the special clips, two sizes, but I’ve not used them before, it will be a learning curve. 

Good tip about the string, I’d not have thought about that myself, yet I can see the problem now  you mention it. 

[dirtrider]

2 hours ago, King Herald said:

Morning DR, 

Yes, the hoses were sourced from Motorworks, specialist BMW supplier that I order all my parts from. They know exactly what bike I have too, it’s all linked to my account. I have ordered the special clips, two sizes, but I’ve not used them before, it will be a learning curve. 

Good tip about the string, I’d not have thought about that myself, yet I can see the problem now  you mention it. 

Morning  King Herald

 

I just remembered, after reading this thread again this morning, (I had a LOT going on yesterday).

 

You have a (R) not an (RT). 

 

On the (R) it has a different shaped & smaller fuel tank than the RT so you might only need a one meter length.  When you replace those in-tank hoses let us know if you can get both vent hoses out of a 1 meter length. 

 

When you post about your motorcycle you probably should make sure that you include that is an (R) especially if posting in an (RT) thread. 

 

[Redfoxx]

4 hours ago, King Herald said:

Morning DR, 

Yes, the hoses were sourced from Motorworks, specialist BMW supplier that I order all my parts from. They know exactly what bike I have too, it’s all linked to my account. I have ordered the special clips, two sizes, but I’ve not used them before, it will be a learning curve. 

Good tip about the string, I’d not have thought about that myself, yet I can see the problem now  you mention it. 

 

King Herald

 

RE: your hoses you can buy Oetiker Stepless®  clamps  and crimping tool from amazon they are handy and quick.  There are also a lot of knock offs for less money there also. With the crimping tool they are easy to put on, you just have to make sure you have the correct size clamps for hose.  Amazon has an assortment set of Oetiker clamps and knock offs. 

 

Also you may want to check pricing at Motorworks, UK, returns maybe harder (shipping), but on some items pricing is way cheaper and shipping from UK to Wisconsin is only about $30 to $40 and only takes 4-5 days normally.  They have the factory BMW submersible vent hose 5mm x 8mm by meter is about $27 US.

 

RF 

[dirtrider]

34 minutes ago, Redfoxx said:

 

King Herald

 

RE: your hoses you can buy Oetiker Stepless®  clamps  and crimping tool from amazon they are handy and quick.  There are also a lot of knock offs for less money there also. With the crimping tool they are easy to put on, you just have to make sure you have the correct size clamps for hose.  Amazon has an assortment set of Oetiker clamps and knock offs. 

 

Also you may want to check pricing at Motorworks, UK, returns maybe harder (shipping), but on some items pricing is way cheaper and shipping from UK to Wisconsin is only about $30 to $40 and only takes 4-5 days normally.  They have the factory BMW submersible vent hose 5mm x 8mm by meter is about $27 US.

 

RF 

Morning RF

 

King Herald lives in the UK so shipping is short but I believe he has to pay that additional VAT tax. 

 

We sort of have 2 somewhat related but different motorcycles & owners in this thread. One an (RT) & one an (R). 

[Redfoxx]

3 hours ago, dirtrider said:

Morning RF

 

King Herald lives in the UK so shipping is short but I believe he has to pay that additional VAT tax. 

 

We sort of have 2 somewhat related but different motorcycles & owners in this thread. One an (RT) & one an (R). 

 

DR

I was unaware he lived in UK,

 

I was just talking bulk hose, not vehicle specific parts.   Euromotoelectrics, USA is $52.25 a meter x 2 is 108.50 plus shipping ,  UK is $27 a meter, x 2 meters is $54 plus $30 shipping is $84. It just makes expensive hose a little less expensive.  VAT tax is like 20%, hose is still cheaper from the UK than the USA with high shipping.. 

 

That was all I was talking about, just math and money. BMW-Bring My Wallet

 

RF

[King Herald]

On 4/12/2024 at 12:11 PM, dirtrider said:

Morning  King Herald

 

I just remembered, after reading this thread again this morning, (I had a LOT going on yesterday).

 

You have a (R) not an (RT). 

 

On the (R) it has a different shaped & smaller fuel tank than the RT so you might only need a one meter length.  When you replace those in-tank hoses let us know if you can get both vent hoses out of a 1 meter length. 

 

When you post about your motorcycle you probably should make sure that you include that is an (R) especially if posting in an (RT) thread. 

 

Morning DR, 

My bad, I was forgetting different models would have different shape and sized tanks. 
 

I’ve still learned something, so it’s all good. When I do the hose changes I’ll post something about how the hose length worked out. 

[BABABeemer]

I’ve changed the vent hoses on both an R and a RT. On the R, I had a meter of hose and there was plenty of left over hose. On the RT, I only had a yard and it was a tight fit. I had to reroute the hose to get it to fit. Fortunately I have placed the filter outside the tank so I don’t think I will need to access the fuel pump plate anymore.

[dmsantam]

I've done this job on my 1995 RT, and as mentioned you need more than 1m, so i had to buy 2 lengths. I bought them from BMW, and they weren't cheap. I also bought new clips for them from BMW. From memory, it was 5mm ID and 8mm OD. Make sure you use the same length as you currently have, and not longer, or it may foul the fuel light float assembly. I can't speak for the requirements on the R. 

[King Herald]

17 hours ago, BABABeemer said:

I’ve changed the vent hoses on both an R and a RT. On the R, I had a meter of hose and there was plenty of left over hose. On the RT, I only had a yard and it was a tight fit. I had to reroute the hose to get it to fit. Fortunately I have placed the filter outside the tank so I don’t think I will need to access the fuel pump plate anymore.

That’s good to hear. I plan to mount my filter externally next time I do the job. The studs on the tank were pretty damaged and torn up when I first got the bike, so I have to stack a couple of washers under each nut to get a grip on decent thread. I’m wary of how many times I can do that before more thread strips off.